be的过去式和过去分词是啥

　　Much of the form was not applicable to me.

　　表格中很多部分不适用于我。

　　A free trade agreement would be advantageous to both countries.

　　自由贸易协定对两国都会有利。

　　She was not only intelligent but also very musical.

　　她不仅聪明，而且极具音乐天分。